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Solar radiation data (15 min int.)


Nichol Mar 6, 2023 03:44 AM

Is it normal if the solar radiation data captured during midnight 00:00 (124 w/m^2)?


anbo Jun 16, 2023 03:43 PM

That's going to depend on your location. 

Does it get completely dark at your location of measurement? 

Kipp & Zonen have a guide on the instruction sheet for the CNR4
(https://www.kippzonen.com/Product/85/CNR4-Net-Radiometer)
where that value seems to correspond with a fully clouded day. 

Might be a little high if you're near the equator.


JDavis Jun 16, 2023 07:12 PM

That would be infrared can be that high with clouds. Shortwave will be 0 on a completely dark night.


Nichol Jul 2, 2023 12:41 PM

The spike is every day at 00:00 midnight only. Zero reading started at 7 pm to 6 am (Malaysia time) 


JDavis Jul 3, 2023 05:28 PM

Does your system switch power on to something around midnight?

It could be that another device connected is using enough current to create an offset voltage on analog ground. Anything using significant power should use G terminals for ground.


dejawitting Nov 3, 2023 02:49 AM

Infrared radiation can penetrate clouds at that altitude. Shortwave will be 0 on a perfectly dark night. wordle today


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blessoctopus Jan 10, 2024 03:22 AM

The detection of 124 w/m^2 of solar energy at midnight, when the sun is set, would not be considered typical. Erroneous results may be the result of a malfunctioning solar radiation sensor. Most likely, this is the case snake io if inaccurate readings are also obtained by other sensors. Certain surfaces may reflect back to the sensor, even at night, the energy from the surrounding environment. Think about the placement of the sensors.

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